ICL232MJE [HARRIS]
+5V Powered, Dual RS-232 Transmitter/Receiver; + 5V供电，双路RS - 232发射器/接收器
| 型号： | ICL232MJE |
| 厂家： | 
HARRIS CORPORATION |
| 描述： | +5V Powered, Dual RS-232 Transmitter/Receiver |
| 文件： | 总5页 (文件大小：45K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
S E M I C O N D U C T O R
ICL232
+5V Powered, Dual RS-232 Transmitter/Receiver
August 1997
Features
Description
• Meets All RS-232C and V.28 Specifications
• Requires Only Single +5V Power Supply
• Onboard Voltage Doubler/Inverter
• Low Power Consumption
The ICL232 is a dual RS-232 transmitter/receiver interface
circuit that meets all ElA RS-232C and V.28 specifications. It
requires a single +5V power supply, and features two
onboard charge pump voltage converters which generate
+10V and -10V supplies from the 5V supply.
• 2 Drivers
The drivers feature true TTL/CMOS input compatibility, slew-
rate-limited output, and 300Ω power-off source impedance.
The receivers can handle up to +30V, and have a 3kΩ to 7kΩ
input impedance. The receivers also have hysteresis to
improve noise rejection.
- ±9V Output Swing for +5V lnput
- 300Ω Power-off Source Impedance
- Output Current Limiting
- TTL/CMOS Compatible
- 30V/µs Maximum Slew Rate
Ordering Information
• 2 Receivers
- ±30V Input Voltage Range
- 3kΩ to 7kΩ Input Impedance
- 0.5V Hysteresis to Improve Noise Rejection
TEMP.
PKG.
NO.
o
PART NUMBER RANGE ( C)
PACKAGE
16 Ld PDIP
ICL232CPE
ICL232CBE
ICL232lPE
ICL232lJE
ICL232lBE
ICL232MJE
0 to 70
0 to 70
E16.3
• All Critical Parameters are Guaranteed Over the Entire
Commercial, Industrial and Military Temperature Ranges
16 Ld SOIC
16 Ld PDIP
M16.3
E16.3
F16.3
M16.3
F16.3
Applications
-40 to 85
-40 to 85
-40 to 85
-55 to 125
• Any System Requiring RS-232 Communications Port
- Computer - Portable and Mainframe
- Peripheral - Printers and Terminals
- Portable Instrumentation
16 Ld CERDIP
16 Ld SOIC
16 Ld CERDIP
- Modems
• Dataloggers
Pinout
Functional Diagram
+5V
ICL232 (PDIP, CERDIP, SOIC)
+
TOP VIEW
1.0µF
16
V
1
C1+
V+
CC
1
2
3
4
5
6
7
8
16
15
14
V
1µF
1µF
CC
C1+
+
+
+
+
2
+5V TO 10V
VOLTAGE INVERTER
1µF
1µF
V+
V-
3
4
GND
C1-
C2+
C1-
C2+
C2-
V-
T1
OUT
+10V TO -10V
VOLTAGE INVERTER
6
5
C2-
13 R1
12 R1
IN
+5V
T1
14
400kΩ
11
OUT
IN
T1
T1
IN
OUT
T1
T2
11
10
9
+5V
400kΩ
T2
10
12
7
T2
T2
IN
OUT
T2
OUT
IN
13
R1
R1
IN
OUT
R2
IN
R2
OUT
5kΩ
5kΩ
R1
R2
9
8
R2
R2
IN
OUT
15
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 3020.5
Copyright © Harris Corporation 1997
8-49
ICL232
Absolute Maximum Ratings
Thermal Information
o
o
V
to Ground . . . . . . . . . . . . . . . . . . . . . .(GND -0.3V) < V
< 6V Thermal Resistance (Typical, Note 1)
θ
( C/W)
θ
( C/W)
CC
V+ to Ground . . . . . . . . . . . . . . . . . . . . . . . (V
CC
-0.3V) < V+ < 12V
JA
JC
CERDIP Package . . . . . . . . . . . . . . . .
PDIP Package . . . . . . . . . . . . . . . . . . .
SOIC Package. . . . . . . . . . . . . . . . . . .
Maximum Junction Temperature
80
100
100
18
N/A
N/A
CC
V- to Ground . . . . . . . . . . . . . . . . . . . . . . . -12V < V- < (GND +0.3V)
Input Voltages
T1 , T2 . . . . . . . . . . . . . . . . . . . . (V- -0.3V) < V < (V+ +0.3V)
IN IN IN
o
R1 , R2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±30V
Plastic Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 C
Ceramic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 C
Maximum Storage Temperature Range . . . . . . . . . .-65 C to 150 C
Maximum Lead Temperature (Soldering 10s) . . . . . . . . . . . . . 300 C
IN IN
o
Output Voltages
T1 , T2
o
o
. . . . . . . . . . . . (V- -0.3V) < V
< (V+ +0.3V)
< (V +0.3V)
OUT OUT
TXOUT
o
R1
, R2
. . . . . . . . .(GND -0.3V) < V
OUT OUT
RXOUT
CC
Short Circuit Duration
T1 , T2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous
OUT
OUT
R1
OUT
, R2
OUT
Operating Conditions
Temperature Ranges
ICL232C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 C to 70 C
ICL232I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 C to 85 C
ICL232M . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 C to 125 C
o
o
o
o
o
o
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
NOTE:
1. θ is measured with the component mounted on an evaluation PC board in free air.
JA
Electrical Specifications Test Conditions: V = +5V ±10%, T = Operating Temperature Range. Test Circuit as in Figure 8
CC
A
Unless Otherwise Specified
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
Transmitter Output Voltage Swing, T
T1
and T2
OUT
Loaded with 3kΩ
±5
±9
±10
V
OUT
OUT
to Ground
o
Power Supply Current, I
Outputs Unloaded, T = 25 C
-
-
5
-
10
0.8
-
mA
V
CC
A
T
T
, Input Logic Low, V
IN
IN
lL
, Input Logic High, V
2.0
-
-
V
lH
Logic Pullup Current, I
T1 , T2 = 0V
IN IN
15
-
200
+30
7.0
-
µA
V
P
RS-232 Input Voltage Range, V
-30
3.0
0.8
-
IN
Receiver Input Impedance, R
IN
V
V
V
= ±3V
5.0
1.2
1.7
0.5
0.1
4.6
0.5
-
kΩ
V
IN
o
Receiver Input Low Threshold, V (H-L)
lN
= 5V, T = 25 C
A
CC
CC
o
Receiver Input High Threshold, V (L-H)
IN
= 5V, T = 25 C
A
2.4
1.0
0.4
-
V
Receiver Input Hysteresis, V
HYST
0.2
-
V
TTL/CMOS Receiver Output Voltage Low, V
OL
I
= 3.2mA
= -1.0mA
V
OUT
TTL/CMOS Receiver Output Voltage High, V
I
3.5
-
V
OH OUT
Propagation Delay, t
RS-232 to TTL
= 10pF, R = 3kΩ, T = 25 C
-
µs
V/µs
PD
o
Instantaneous Slew Rate, SR
C
-
30
L
L
A
(Notes 2, 3)
Transition Region Slew Rate, SR
R
= 3kΩ, C = 2500pF Measured
-
3
-
V/µs
T
L
L
from +3V to -3V or -3V to +3V
Output Resistance, R
OUT
V
= V+ = V- = 0V, V
OUT
= ±2V
300
-
-
-
-
Ω
CC
RS-232 Output Short Circuit Current, I
T1
or T2
OUT
Shorted to GND
±10
mA
SC
OUT
NOTES:
2. Guaranteed by design.
3. See Figure 4 for definition.
8-50
ICL232
Test Circuits
C1+
V+
1
2
3
4
5
6
7
8
16
15
14
V
CC
+4.5V TO
+5.5V INPUT
-
+
GND
1µF
C3
C1+
V+
V
1
2
3
4
5
6
7
8
16
CC
C1-
C2+
C2-
T1
OUT
+
1µF
GND 15
R1 13
IN
C1
-
3kΩ
T1
OUT
R1
OUT
12
11
10
9
C1-
C2+
C2-
V-
14
13
12
11
10
9
T1 OUTPUT
RS-232
±30V INPUT
T1
IN
V-
R1
IN
+
1µF
C2
T2
T2
IN
-
OUT
TTL/CMOS
OUTPUT
R1
OUT
1µF C4
-
+
R2
R2
OUT
IN
TTL/CMOS
INPUT
T1
T2
IN
IN
3kΩ
TTL/CMOS
INPUT
R
= V /I T2
IN OUT
T2
OUT
OUT
T2 OUTPUT
V
= ±2V
A
IN
RS-232
±30V INPUT
TTL/CMOS
OUTPUT
R2
OUT
R2
IN
T1
OUT
FIGURE 1. GENERAL TEST CIRCUIT
FIGURE 2. POWER-OFF SOURCE RESISTANCE
CONFIGURATION
Typical Performance Curves
550
10
9
500
V+ (V
= 5V)
CC
o
= 25 C
V- SUPPLY
T
A
450
400
350
300
250
200
150
8
7
6
5
4
3
V+ (V
CC
= 4.5V)
EXTERNAL SUPPLY LOAD
1kΩ BETWEEN V+ + GND
OR V- + GND
TRANSMITTER OUTPUT
OPEN CIRCUIT
V- (V
= 5V)
V- (V
= 4.5V)
CC
CC
GUARANTEED
OPERATING
RANGE
V+ SUPPLY
o
T
= 25 C
A
TRANSMITTER OUTPUTS
OPEN CIRCUIT
3
4
5
6
0
1
2
3
4
5
6
7
8
9
10
INPUT SUPPLY VOLTAGE V
(V)
|I
| (mA)
CC
LOAD
FIGURE 3. V+, V- OUTPUT IMPEDANCES vs V
CC
FIGURE 4. V+, V- OUTPUT VOLTAGES vs LOAD CURRENT
Pin Descriptions
PDIP, CERDIP
SOIC
PIN NAME
C1+
V+
DESCRIPTION
1
2
1
2
External capacitor “+” for internal voltage doubler.
Internally generated +10V (typical) supply.
3
3
C1-
External capacitor “-” for internal voltage doubler.
External capacitor “+” internal voltage inverter.
External capacitor “-” internal voltage inverter.
4
4
C2+
C2-
5
5
6
6
V-
Internally generated -10V (typical) supply.
7
7
T2
RS-232 Transmitter 2 output ±10V (typical).
OUT
8
8
R2
RS-232 Receiver 2 input, with internal 5K pulldown resistor to GND.
Receiver 2 TTL/CMOS output.
IN
9
9
R2out
10
11
10
11
T2
T1
Transmitter 2 TTL/CMOS input, with internal 400K pullup resistor to V
.
.
IN
CC
CC
Transmitter 1 TTL/CMOS input, with internal 400K pullup resistor to V
IN
8-51
ICL232
Pin Descriptions (Continued)
PDIP, CERDIP
SOIC
PIN NAME
DESCRIPTION
12
13
14
15
16
12
R1
Receiver 1 TTL/CMOS output.
OUT
13
R1
RS-232 Receiver 1 input, with internal 5K pulldown resistor to GND.
RS-232 Transmitter 1 output ±10V (typical).
Supply Ground.
IN
14
T1
OUT
15
GND
16
V
Positive Power Supply +5V ±10%
CC
VOLTAGE DOUBLER
+
VOLTAGE INVERTER
+
S5
S1
S3
S2
C2
C1
V+ = 2V
S6
CC
V
GND
CC
+
+
+
+
C3
C2
C4
C1
-
-
-
-
V
GND
CC
V- = -(V+)
GND
C1-
S4
C2-
S7
S8
RC
OSCILLATOR
FIGURE 5. DUAL CHARGE PUMP
Detailed Description
The ICL232 is a dual RS-232 transmitter/receiver powered by Transmitters
a single +5V power supply which meets all ElA RS232C spec-
The transmitters are TTL/CMOS compatible inverters which
translate the inputs to RS-232 outputs. The input logic thresh-
ifications and features low power consumption. The functional
diagram illustrates the major elements of the ICL232. The cir-
cuit is divided into three sections: a voltage doubler/inverter,
dual transmitters, and dual receivers Voltage Converter.
old is about 26% of V , or 1.3V for V
= 5V. A logic 1 at
CC CC
the input results in a voltage of between -5V and V- at the out-
put, and a logic 0 results in a voltage between +5V and (V+
An equivalent circuit of the dual charge pump is illustrated in - 0.6V). Each transmitter input has an internal 400kΩ pullup
Figure 5.
resistor so any unused input can be left unconnected and its
output remains in its low state. The output voltage swing
meets the RS-232C specification of ±5V minimum with the
worst case conditions of: both transmitters driving 3kΩ mini-
The voltage quadrupler contains two charge pumps which use
two phases of an internally generated clock to generate +10V
and -10V. The nominal clock frequency is 16kHz. During
phase one of the clock, capacitor C1 is charged to V
During phase two, the voltage on C1 is added to V
producing a signal across C2 equal to twice V . At the same
time, C3 is also charged to 2V , and then during phase one,
CC
mum load impedance, V
= 4.5V, and maximum allowable
CC
.
,
CC
CC
operating temperature. The transmitters have an internally
limited output slew rate which is less than 30V/µs. The outputs
are short circuit protected and can be shorted to ground indef-
initely. The powered down output impedance is a minimum of
CC
it is inverted with respect to ground to produce a signal across
C4 equal to -2V . The voltage converter accepts input
300Ω with ±2V applied to the outputs and V
= 0V.
CC
CC
voltages up to 5.5V. The output impedance of the doubler (V+)
is approximately 200Ω, and the output impedance of the
inverter (V-) is approximately 450Ω. Typical graphs are
presented which show the voltage converters output vs input
voltage and output voltages vs load characteristics. The test
circuit (Figure 3) uses 1µF capacitors for C1-C4, however, the
value is not critical. Increasing the values of C1 and C2 will
lower the output impedance of the voltage doubler and
inverter, and increasing the values of the reservoir capacitors,
C3 and C4, lowers the ripple on the V+ and V- supplies.
V+
V
CC
400kΩ
300Ω
T
XIN
T
OUT
GND < T
< V
CC
XIN
V-
V- < V
< V+
TOUT
FIGURE 7. TRANSMITTER
Receivers
The receiver inputs accept up to ±30V while presenting the
required 3kΩ to 7kΩ input impedance even it the power is off
T1 , T2
IN
IN
(V
= 0V). The receivers have a typical input threshold of
CC
90%
10%
V
OH
T1
, T2
1.3V which is within the ±3V limits, known as the transition
region, of the RS-232 specification. The receiver output is
0V to V . The output will be low whenever the input is
greater than 2.4V and high whenever the input is floating or
driven between +0.8V and -30V. The receivers feature 0.5V
hysteresis to improve noise rejection.
OUT
OUT
V
OL
t
t
f
r
CC
(0.8) (V
OH
- V
OL
)
(0.8) (V - V )
OL OH
Instantaneous
Slew Rate (SR)
=
or
t
t
f
r
FIGURE 6. SLEW RATE DEFINITION
8-52
ICL232
is generated by driving them through a 5kΩ resistor
connected to V+.
V
CC
R
XIN
R
+5V
OUT
C3
1µF
-
+
-30V < R
< +30V
XIN
GND < V
< V
CC
5kΩ
ROUT
5kΩ
2
6
16
GND
CTR (20) DATA
TERMINAL READY
1
+
C1
1µF
5kΩ
FIGURE 8. RECEIVER
3
4
DSRS (24) DATA
SIGNALING RATE
SELECT
-
ICL232
T1 , T2
IN IN
+
-
+
OR
R1 , R2
C2
1µF
C4
RS-232
1µF
5
-
IN
IN
INPUTS AND OUTPUTS
T1
11
14
T1
R1
, T2
OUT
OUT
V
TD
OH
TD (2) TRANSMIT DATA
RTS (4) REQUEST TO SEND
RD (3) RECEIVE DATA
OR
T2
V
10
12
7
OL
, R2
INPUTS
OUTPUTS
OUT
OUT
RTS
t
t
PLH
PHL
13
TTL/CMOS RD
R2
R1
9
8
t
t
PHL + PLH
2
CTS
CTS (5) CLEAR TO SEND
Average Propagation Delay =
FIGURE 9. PROPAGATION DELAY DEFINITION
15
SIGNAL GROUND (7)
Applications
FIGURE 10. SIMPLE DUPLEX RS-232 PORT WITH CTS/RTS
HANDSHAKING
The ICL232 may be used for all RS-232 data terminal and
communication links. It is particularly useful in applications
where ±12V power supplies are not available for conven-
tional RS-232 interface circuits. The applications presented
represent typical interface configurations.
In applications requiring four RS-232 inputs and outputs
(Figure 11), note that each circuit requires two charge pump
capacitors (C1 and C2) but can share common reservoir
capacitors (C3 and C4). The benefit of sharing common res-
ervoir capacitors is the elimination of two capacitors and the
reduction of the charge pump source impedance which
effectively increases the output swing of the transmitters.
A simple duplex RS-232 port with CTS/RTS handshaking is
illustrated in Figure 10. Fixed output signals such as DTR
(data terminal ready) and DSRS (data signaling rate select)
1
4
+
+
C1
C2
ICL232
T1
5
1µF
3
1µF
-
-
11
14
TD
RTS
RD
TD (2) TRANSMIT DATA
RTS (4) REQUEST TO SEND
RD (3) RECEIVE DATA
T2
10
12
7
INPUTS
OUTPUTS
TTL/CMOS
13
R2
R1
9
8
CTS
CTS (5) CLEAR TO SEND
15
6
6
2
2
C4
C3
+5V
RS-232
-
-
V- V+
2µF
2 µF
INPUTS AND
OUTPUTS
16
ICL232
T1
1
4
5
+
+
C1
1µF
C2
1µF
3
-
-
11
14 DTR (20) DATA TERMINAL
READY
7
DTR
DSRS
DCD
R1
T2
10
12
DSRS (24) DATA SIGNALING
RATE SELECT
DCD (8) DATA CARRIER
DETECT
INPUTS
OUTPUTS
TTL/CMOS
13
R2
R1
9
8
R1 (22) RING INDICATOR
15
SIGNAL GROUND (7)
FIGURE 11. COMBINING TWO ICL232s FOR 4 PAIRS OF RS-232 INPUTS AND OUTPUTS
8-53
相关型号：
ICL3207CAZ
Low Power, +3V To +5.5V, 250kbps, RS-232 Transmitters/Receivers; SOIC24, SSOP24; Temp Range: See Datasheet
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